The FTK4903 from First Silicon is a MOSFET with Continous Drain Current -6.3 to -10 A, Drain Source Resistance 11.5 to 22 milli-ohm, Drain Source Breakdown Voltage -40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -1.0 to -2.5 V. Tags: Surface Mount. More details for FTK4903 can be seen below.